Add a test for that both #include and #line exist in source code.
Add a test for that both #include and #line exist in source code.

Qining/shaderc,antiagainst/shaderc,Samana/shaderc,AWoloszyn/shaderc,fuchsia-mirror/third_party-shaderc,antiagainst/shaderc,AWoloszyn/shaderc,Qining/shaderc,dneto0/shaderc,fuchsia-mirror/third_party-shaderc,Qining/shaderc,dneto0/shaderc,dneto0/shaderc,drewet/shaderc,Samana/shaderc,antiagainst/shaderc,davidlee80/shaderc,AWoloszyn/shaderc,davidlee80/shaderc,antiagainst/shaderc,drewet/shaderc,fuchsia-mirror/third_party-shaderc,Samana/shaderc,drewet/shaderc,dneto0/shaderc,davidlee80/shaderc